slumping- avoid frosting on backside?

This is the main board for discussing general techniques, tools, and processes for fusing, slumping, and related kiln-forming activities.

Moderators: Brad Walker, Tony Smith

Post Reply
Bonnie Rubinstein
Posts: 213
Joined: Sun May 04, 2003 9:04 pm
Location: River Falls, WI

slumping- avoid frosting on backside?

Post by Bonnie Rubinstein »

Hi Wise-Ones,

I am fusing with system 96 and am using transparent colors- when I slumped into bowl mold, it got 'frosted' on the bottom side.. it was recommended on my next piece I raise the temp (from 1450 to 1470), but that resulted in big bubbles... don't wish to loose more pieces.. any thoughts? If I lower the temp, will that work?

Thanks kindly...
Bonnie
Bonnie Rubinstein
Amy Schleif-Mohr
Posts: 280
Joined: Sun Mar 09, 2003 5:18 pm
Location: Milwaukee

Post by Amy Schleif-Mohr »

You don't indicate that you are slumping at 1450 or not. If you are that is WAY to hot. Slumping temps are normally between 1100 and 1200.

Amy
Val
Posts: 35
Joined: Sun May 25, 2003 8:01 pm
Contact:

Post by Val »

I was having the same problem through experimenting I found although I couldn't eliminate all frosting I reduced it to the upper inch and a half.

results of experiment using spectrum clear - reduce temp. to 1250 or as low as your kiln allows to slump and reduce time to as little as possible.

I reduced time on a 11 3/4" bowl to 5 minutes and still got frostinfg on upper edge, but I like the look so I'm happy. :D That is until I want it completely clear.

Val
Bonnie Rubinstein
Posts: 213
Joined: Sun May 04, 2003 9:04 pm
Location: River Falls, WI

Post by Bonnie Rubinstein »

Amy,

woops- too many #s in my head today-( plus my 6 year old's pool party is going on!) ..I meant to say that I slumped at 1270 instead of 1250.. I will try lower, thanks... and thanks, Val.

Bonnie
Bonnie Rubinstein
Tony Smith
Posts: 1037
Joined: Sun Mar 09, 2003 5:59 pm
Location: Massachusetts, USA
Contact:

Post by Tony Smith »

Bonnie,

I found I was still getting too much texture for my liking at 1250°, so now I slump at 1150° for 20 minutes.

Tony
The tightrope between being strange and being creative is too narrow to walk without occasionally landing on both sides..." Scott Berkun
Post Reply